Glad to hear it isn't just me and my relatively new, though standard HP, Laptop. The franchise is not without its glitches and such, which most of the time is manageable and I ignore them, but the routing/AI pathing issue and actions that queue randomly that you can't cancel has to be its biggest drawback, imo. Half my plays after a certain point consist of pause. Unpause. Pause. I had the same problem with 3 and sometimes 2. Eventually the animation catches up (sorry, I don't know the proper word for this) with the action I have qeued and my sim is able to continue. I've also tested this without scripts and to no avail, even lowered the settings which does help a little.
By now of course, nearly an hour in-game has passed because the time clock is running fine, regardless of sims standing there. Also, why do sims cross over to another room JUST to do a certain action from the same conversation...uh, okay then? Perhaps they aren't play testing as thoroughly as your average simmer would, perhaps they are and only have so much time to devote to the game itself before a deadline nor fix the lingering bugs. If this is indeed the case, than why not confirm it. I mean, at the end of the day it's almost typical of them at this point. Not saying it's right or that we stand by and say nothing, but typical. I understand the frustration.
I'm no expert in what goes on behind the scenes, but I often wonder how something that seems to effect many players goes virtually without a fix for so long. Not degrading anyone, I appreciate what they do fix and the added content they provide via updates, it simply makes me wonder at times. It also makes me question if whether to dump money into any further games they decide to add to the franchise is worth it. Do they actually appreciate the fact we're still supporting them nonstop? Hard to say. Those patch notes can be... taken certain ways, depending on one's perspective. But that's a story for another time.
One thing I've noticed is that the less sims you have in a household, the more responsive the AI is. Not sure what's going on there, could be a storage issue with my PC, but just throwing that out in case anyone has ideas. I wouldn't mind if they got rid of the festivals, it's pretty boring when you've tried everything and the actions specific to NPC's (Ex. Love Guru) would be better suited if they brought back the matchmaking service or did away with the timed event altogether. I love the franchise too much to leave it entirely, but I do play it significantly less than other games.